syzkaller login: [ 38.834134] BUG: Bad rss-counter state mm:000000004c5df2df type:MM_FILEPAGES val:32 [ 38.835362] BUG: Bad rss-counter state mm:000000004c5df2df type:MM_ANONPAGES val:22 [ 38.909896] ================================================================== [ 38.910806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.911751] Read of size 8 at addr ffff88800efdc228 by task sshd/219 [ 38.912523] [ 38.912744] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.913819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.914810] Call Trace: [ 38.915132] [ 38.915420] dump_stack_lvl+0x91/0xf0 [ 38.915920] print_report+0xcc/0x620 [ 38.916409] ? __virt_addr_valid+0x102/0x340 [ 38.916982] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917609] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918235] kasan_report+0xbe/0xf0 [ 38.918719] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919361] vma_interval_tree_remove+0xc75/0xec0 [ 38.919968] vma_prepare+0xc54/0x11a0 [ 38.920453] __split_vma+0x5af/0x950 [ 38.920953] ? __pfx___split_vma+0x10/0x10 [ 38.921484] ? find_held_lock+0x2c/0x110 [ 38.922006] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.922579] ? lock_is_held_type+0x9f/0x120 [ 38.923124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.923753] ? mtree_range_walk+0x632/0x900 [ 38.924323] ? mas_walk+0x5c7/0x7c0 [ 38.924838] do_vmi_munmap+0x1f1/0x2b0 [ 38.925340] mmap_region+0x1f9/0x2660 [ 38.925829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.926345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.927088] ? __pfx_lock_acquire+0x10/0x10 [ 38.927629] ? __pfx_mmap_region+0x10/0x10 [ 38.928177] ? security_mmap_addr+0x7d/0xa0 [ 38.928724] ? get_unmapped_area+0x1f5/0x3f0 [ 38.929293] do_mmap+0x854/0xf00 [ 38.929750] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.930249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.930819] ksys_mmap_pgoff+0x3af/0x500 [ 38.931395] do_syscall_64+0x3f/0x90 [ 38.931906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932590] RIP: 0033:0x7efe7dc07d82 [ 38.933064] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.935065] RSP: 002b:00007ffcf724bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.935925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe7dc07d82 [ 38.936728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe7d041000 [ 38.937531] RBP: 00007efe7d041000 R08: 0000000000000009 R09: 0000000000001000 [ 38.938328] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575d4a97d90 [ 38.939129] R13: 00007ffcf724bb80 R14: 00007ffcf724bbb0 R15: 00007ffcf724bf10 [ 38.939937] [ 38.940213] [ 38.940419] Allocated by task 212: [ 38.940830] kasan_save_stack+0x22/0x50 [ 38.941324] kasan_set_track+0x25/0x30 [ 38.941825] __kasan_slab_alloc+0x59/0x70 [ 38.942349] kmem_cache_alloc+0x16b/0x370 [ 38.942862] vm_area_dup+0x20/0x160 [ 38.943327] __split_vma+0x170/0x950 [ 38.943787] split_vma+0xc6/0x110 [ 38.944228] mprotect_fixup+0x8d2/0xb30 [ 38.944739] do_mprotect_pkey+0x87e/0xd40 [ 38.945284] __x64_sys_mprotect+0x78/0xc0 [ 38.945804] do_syscall_64+0x3f/0x90 [ 38.946282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946919] [ 38.947137] Freed by task 212: [ 38.947536] kasan_save_stack+0x22/0x50 [ 38.948047] kasan_set_track+0x25/0x30 [ 38.948548] kasan_save_free_info+0x2b/0x50 [ 38.949081] __kasan_slab_free+0x10a/0x190 [ 38.949616] kmem_cache_free+0x10d/0x4d0 [ 38.950127] rcu_core+0x8c8/0x2860 [ 38.950575] __do_softirq+0x1b7/0x7d4 [ 38.951053] [ 38.951268] Last potentially related work creation: [ 38.951856] kasan_save_stack+0x22/0x50 [ 38.952356] __kasan_record_aux_stack+0x8e/0xa0 [ 38.952959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.953616] remove_vma+0x139/0x170 [ 38.954071] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.954643] do_vmi_munmap+0x1f1/0x2b0 [ 38.955127] __vm_munmap+0x138/0x3a0 [ 38.955593] __x64_sys_munmap+0x59/0x80 [ 38.956101] do_syscall_64+0x3f/0x90 [ 38.956576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.957234] [ 38.957447] The buggy address belongs to the object at ffff88800efdc1d0 [ 38.957447] which belongs to the cache vm_area_struct of size 168 [ 38.958938] The buggy address is located 88 bytes inside of [ 38.958938] freed 168-byte region [ffff88800efdc1d0, ffff88800efdc278) [ 38.960353] [ 38.960570] The buggy address belongs to the physical page: [ 38.961239] page:00000000291e8fd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefdc [ 38.962333] memcg:ffff88800f1bb801 [ 38.962768] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.963424] page_type: 0xffffffff() [ 38.963875] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.964828] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1bb801 [ 38.965741] page dumped because: kasan: bad access detected [ 38.966401] [ 38.966619] Memory state around the buggy address: [ 38.967206] ffff88800efdc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.968066] ffff88800efdc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.968936] >ffff88800efdc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.969790] ^ [ 38.970342] ffff88800efdc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.971204] ffff88800efdc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.972061] ================================================================== [ 38.973453] Disabling lock debugging due to kernel taint [ 40.906835] BUG: Bad rss-counter state mm:00000000889a5a34 type:MM_FILEPAGES val:33 [ 40.907763] BUG: Bad rss-counter state mm:00000000889a5a34 type:MM_ANONPAGES val:22 [ 41.312926] BUG: Bad rss-counter state mm:00000000e0a15b09 type:MM_FILEPAGES val:33 [ 41.313902] BUG: Bad rss-counter state mm:00000000e0a15b09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55550' (ECDSA) to the list of known hosts. 2023/06/20 17:20:15 fuzzer started 2023/06/20 17:20:15 dialing manager at localhost:36067 2023/06/20 17:20:15 checking machine... 2023/06/20 17:20:15 checking revisions... [ 42.042384] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:20:15 testing simple program... [ 42.089039] cgroup: Unknown subsys name 'net' [ 42.127235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:15 Registers: info registers vcpu 0 RAX=ffff888008dfc000 RBX=0000000000000018 RCX=0000000000000000 RDX=ffff8880147a1b40 RSI=0000000000000001 RDI=ffff888008dfc000 RBP=ffff888009b77000 RSP=ffff88801c997a88 R8 =0000000000000003 R9 =000000000000005d R10=0000000000000019 R11=0000000000000000 R12=ffff88801c997d68 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff81f37994 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffbde65b900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffbdec10650 CR3=000000000e59e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=00007ffec6eebd50 RSP=00007ffec6eeb800 R8 =0000000000000000 R9 =000000000000001a R10=00007ffec6eebd17 R11=0000000000000000 R12=00007ffec6eebd60 R13=00007ffbdf18aa84 R14=00007ffec6eebea0 R15=0000000000000064 RIP=00007ffbdeaba63c RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffbde65b900 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffbdec130b0 CR3=000000000e59e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=000000000000000000000000ff00ff00 XMM02=000000000000000000000000ff000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=5f6c697475646f6d6d61705f0064255f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000